The two equations given make the straight line LJ.
A straight line is 180 degrees.
Add the 2 equations together and set to equal 180:
2m +10 + 5m +100 = 180
Combine like terms on the left side:
7m + 110 = 180
Subtract 110 from each side:
7m = 70
Divide both sides by 7:
m = 70 /7
m = 10
